/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.spark.sql.execution

import org.apache.spark.sql.SparkSession

/**
  * Created by allwefantasy on 7/8/2018.
  */
object WowFastLocalBasedStrategies {
  def register(sparkSession: SparkSession): Unit = {
    sparkSession.experimental.extraStrategies = Seq(
      new WowFastLocalTableScanStrategies()
    ) ++: sparkSession.experimental.extraStrategies

    sparkSession.sessionState.optimizer.batches
  }

  def unRegister(sparkSession: SparkSession): Unit = {
    sparkSession.experimental.extraStrategies =
      sparkSession.experimental.extraStrategies
        .filter(strategy => !strategy.isInstanceOf[WowFastLocalTableScanStrategies])
  }
}
